Newton screening tool shows high specificity for detecting cannabis use disorder in teens visiting the ER

For cannabis use disorder, the Newton screen achieved baseline sensitivity of 93.1% and specificity of 93.5%. For alcohol use disorder, sensitivity was 78.3% with 93.0% specificity. Predictive validity at 1-3 year follow-up showed high specificity but lower sensitivity for both substances.

Validation study within 16 pediatric emergency departments (PECARN network) enrolling 4,898 adolescents aged 12-17. Concurrent validity assessed against structured DSM-based interviews. Convergent validity tested against AUDIT. Predictive validity assessed at 1, 2, and 3 years.

Emergency departments see adolescents who might not otherwise encounter substance use screening. A brief, validated tool that works in the chaotic ED environment could identify at-risk teens and connect them with early intervention.

Brief screening tools are only useful if they are accurate and practical. The Newton screen's strong performance for cannabis, especially the high sensitivity that catches most true cases, addresses a real clinical need in pediatric emergency settings.

Higher sensitivity for cannabis than alcohol may reflect the tool's design or differences in adolescent substance use patterns. Predictive sensitivity was lower at follow-up, suggesting it may miss some who develop problems later. ED populations may differ from general adolescent populations.